Stochastic combustion modeling of a direct injection diesel engine

Thesis/Dissertation · Sun Jan 01 00:00:00 EST 1984

OSTI ID:5850500

Mohammadzadeh, A

A mathematical model was developed to simulate the combustion process of a direct injection diesel engine. The model considers the key features of such a combustion process; namely fuel droplet evaporation, spray formation, mixing, ignition of heterogeneous burning of the fuel. To model mixing, great emphasis was placed on treating both large and small scale aspects of mixing, the model divides the combustion chamber into three distinct regions of air, fuel spray, and a turbulent plume that is formed once ignition occurs. The fuel spray itself is considered to be composed of multiple zones, which in turn are made of cells of equal mass and of different thermodynamic states. Micromixing of the fuel and air cells, within each zone of the jet and the turbulent plume, is then achieved by utilizing the concept of Monte Carlo stochastic coalescence dispersion technique. The frequency of such cell interactions within each zone is obtained by employing a K-1 turbulent sub-model. To accomplish the burning of the fuel, the model both simulates a turbulent flame and considers auto-ignition as the burning mechanism, with the rate of burning being controlled by the fine scale structure of the turbulent field.

• OSTI ID: 5850500
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
COMBUSTION
MATHEMATICAL MODELS
DIESEL ENGINES
FUEL INJECTION SYSTEMS
ATOMIZATION
DROPLETS
IGNITION
MIXING
STOCHASTIC PROCESSES
CHEMICAL REACTIONS
ENGINES
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OXIDATION
PARTICLES
THERMOCHEMICAL PROCESSES
330102* - Internal Combustion Engines- Diesel